// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Extensions to the standard "os" package.
package osext

import (
	"path"
	"path/filepath"
)

// Executable returns an absolute path that can be used to
// re-invoke the current program.
// It may not be valid after the current program exits.
func Executable() (string, error) {
	p, err := executable()
	return filepath.Clean(p), err
}

// Returns same path as Executable, returns just the folder
// path. Excludes the executable name and any trailing slash.
func ExecutableFolder() (string, error) {
	p, err := Executable()
	if err != nil {
		return "", err
	}

	return filepath.Dir(p), nil
}

//GetAbsPath 获取绝对路径
func GetAbsPath(filename string) (string, error) {
	if !path.IsAbs(filename) {
		filename, err := filepath.Abs(filename)
		return filename, err
	}
	return filename, nil
}
